Improvement in middlings-purifiers



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INVENTUB ATTUBNEYS.

UNITED STATES PATENT OFFICE.

JAMES A. STEWART, OF ATLANTA, GEORGIA.

IMPROVEMENT IN MIDDLI NGS-PURIFIERS.

Specification forming part of Letters Patent No. 149,166, dated March31, 1874; application filed February 7, 1874.

To all whom it may concern:

Be it known that I, James A. STEWART, of Atlanta, in the county ofFulton and State of Georgia, have invented a new and useful Improvementin Middlings-Purifier, of which the following is a specification:

Figure l is a longitudinal section of a portion of the descending trunkof a middlingselevator to which my improvement has been applied. Fig. 2is a detail section of the same taken through the line :v as, Fig. 1.

Similar letters of reference indicate corresponding parts.

The invention will first be fully described, and then pointed out in theclaim.

A represents the descending trunk of a middlings elevator, through whichthe endless chain of buckets B descends. O is a sharply tapering flue,with a wide upper end, which is attached to the outer side of theelevatortrunk A, and the lower end *of which communicates with theinterior of the said trunk through a large hole formed in its said outerside. With the wide upper end of the flue O is connected a suction orexhaust fan, D, as shown in Figs. 1, and 2, through which the fine browndust and specks are drawn from the middlings. A free supply of airshould be admitted into the lower part of the trunk A by means of gatesor other devices that can be opened and closed, as desired, to regulatethe draft.

The middlings are admitted into the upper part of the trunk A, through aspout, E, as fast as they fall from the dusting-reels, and while stillin their loose or disintegrated state, and as they fall from one bucket,B, to another, they are acted upon by the blast of air which is passingup through the falling middlin gs.

Having thus described my invention, I claim as new and desire to secureby Letters Paten t The combination of middlings-elevator trunk A,endless chain of buckets 1), flue C, and suction-fan D, in the mannerdescribed.

4 7 JAMES A. STEWART. \Vitnesses:

E. L. WINHAM,

H. l). AUSTIN,

J. H. GoLnsMiTn.

